The world is full of wonder. Jellyfish and other sea creatures can change colour at will or in reaction to stimuli. Chameleons blend into surroundings. Moths in Liverpool have evolved to disguise themselves to a spattering of pollutants on the sides of white buildings.

Magnets can change the colour of a liquid. At least that's what scientists have lately discovered with nanotechnology.

It's a Small World, After All

'Nanotechnology is full of surprises and new applications are discovered every day. One of the most unusual is the recent experiment of a team of scientists who were able to make a magnet change the color of a liquid, turning it from coffee-brown to orange, then green and finally dark blue. ... The liquid is actually a solution of iron oxide in water and this is the first time anyone has proven such a strange effect of magnetism.'

The iron-oxide solution could be employed in new displays, improving quality and colour range, and in rewritable electronic paper, which is already available.

To learn more, read the article at Softpedia.